1.25mm pitch wire-to-board SMT connectors Overview
The 1.25mm pitch wire-to-board SMT connectors series delivers high-performance interconnect solutions for modern, space-constrained printed circuit board assemblies. These low-profile micro-connectors are designed to withstand automated surface mount reflow processes.
1.25mm pitch wire-to-board SMT connectors Technical Specifications
| Property | Specification |
| Rated Voltage | 50V AC, DC |
| Rated Current | 1A |
| Contact Resistance | 20mΩ max |
| Insulation Resistance | 100MΩ min |
| Withstand Voltage | 250V AC/minute |
| Ambient Temperature | -25°C to +85°C |
| Applicable Wire Range | AWG#32 ~ #28 |
Premium Material Specifications
We guarantee long-term durability and structural integrity through the selection of premium, industry-certified materials.
SMT Wafer Header: We mold this component from Liquid Crystal Polymer (LCP, UL94V-0). This material features superior thermal stability.
Crimp Housing: We injection-mold this part from high-grade Nylon (PA66, UL94V-0).
Crimp Terminal: We fabricate this contact from high-elasticity Phosphor Bronze (Tin-Plated).
Ordering Information & Mechanical Dimensions
Customers can order this series in multiple configurations ranging from 2 to 15 positions.
| Pins (Lines) | Wafer (Straight) | Wafer (Right-Angle) | Housing Type | Dimension A (mm) | Dimension B (mm) |
| 2 | 1.25-2A | 1.25-2AW | 1.25-2Y | 1.25 | 4.25 |
| 3 | 1.25-3A | 1.25-3AW | 1.25-3Y | 2.50 | 5.50 |
| 4 | 1.25-4A | 1.25-4AW | 1.25-4Y | 3.75 | 6.75 |
| 5 | 1.25-5A | 1.25-5AW | 1.25-5Y | 5.00 | 8.00 |
| 6 | 1.25-6A | 1.25-6AW | 1.25-6Y | 6.25 | 9.25 |
| 7 | 1.25-7A | 1.25-7AW | 1.25-7Y | 7.50 | 10.50 |
| 8 | 1.25-8A | 1.25-8AW | 1.25-8Y | 8.75 | 11.75 |
| 9 | 1.25-9A | 1.25-9AW | 1.25-9Y | 10.00 | 13.00 |
| 10 | 1.25-10A | 1.25-10AW | 1.25-10Y | 11.25 | 14.25 |
| 11 | 1.25-11A | 1.25-11AW | 1.25-11Y | 12.50 | 15.50 |
| 12 | 1.25-12A | 1.25-12AW | 1.25-12Y | 13.75 | 16.75 |
| 13 | 1.25-13A | 1.25-13AW | 1.25-13Y | 15.00 | 18.00 |
| 14 | 1.25-14A | 1.25-14AW | 1.25-14Y | 16.25 | 19.25 |
| 15 | 1.25-15A | 1.25-15AW | 1.25-15Y | 17.50 | 20.50 |
Customization and Wire Harness Assembly Services
As a specialized manufacturer, we provide comprehensive custom-tailored solutions to complement our standard 1.25mm pitch SMT connector range. For instance, fully customized wire harness assemblies and cable design configurations can be processed smoothly according to your specific technical drawings. Please contact our technical sales team today to receive a rapid quotation or to request a sample for qualification.
Frequently Asked Questions
1. What is the 1.25mm pitch connector best suited for?
The 1.25mm pitch is a micro-connector optimized for space-constrained PCB designs where every millimeter counts. It is ideal for portable electronics, handheld devices, compact communication modules, and high-density wiring in IoT and consumer applications where board space is at a premium.
2. What pin counts and mounting orientations are available?
This series is available in 2 to 15 positions, with both Straight (vertical) and Right-Angle wafer options. Each position has a detailed ordering code (e.g., 1.25-2A for 2-pin straight, 1.25-2AW for 2-pin right-angle) with matched crimp housings (e.g., 1.25-2Y for 2-pin housing) for easy specification and procurement.
3. What is the electrical rating?
Rated current is 1A with a rated voltage of 50V AC, DC. Contact resistance is 20mΩ max, insulation resistance is 100MΩ min, and withstand voltage is 250V AC/minute. These parameters ensure reliable signal integrity for low-power electronic circuits.
4. What is the operating temperature range?
The ambient temperature range is -25°C to +85°C, suitable for consumer electronics, portable devices, and indoor industrial applications where extreme temperatures are not a factor.
5. What materials are used in this connector?
The connector uses three high-grade materials: the SMT wafer header is molded from Liquid Crystal Polymer (LCP, UL94V-0) for superior thermal stability during reflow; the crimp housing is made of high-grade Nylon (PA66, UL94V-0) for mechanical strength; and the crimp terminal is Phosphor Bronze with Tin-Plating for high elasticity and corrosion resistance.
6. What wire gauge does this connector accept?
Applicable wire range is AWG#32 ~ #28, covering very fine-gauge wires commonly used in micro-connector applications. Using the correct wire size is critical for achieving the rated 1A current and ensuring reliable crimp termination.
7. Is this connector compatible with automated SMT assembly?
Yes. The wafer headers are designed for surface mount reflow processes and are fully compatible with automated pick-and-place assembly. The LCP material provides excellent thermal stability during lead-free reflow soldering.
8. What are the dimensional specifications for each pin count?
Detailed dimension A (width) and dimension B (length) values are provided for each 2-15 pin configuration in the ordering information table. For example, the 2-pin version measures 1.25mm x 4.25mm (Dim A x Dim B), while the 15-pin version measures 17.50mm x 20.50mm. Request our PDF technical drawing for complete mechanical drawings.
9. Do you provide technical datasheets?
Yes. Request PDF technical drawings and detailed specifications using the form above (click “Download Specifications & Request a Quote”). Our engineering team can also assist with footprint recommendations and custom design support.
10. Can I get custom wire harness assemblies?
Yes. As a specialized manufacturer, we provide fully customized wire harness assemblies and cable design configurations processed according to your specific technical drawings. Contact our technical sales team via the email below for rapid quotations, sample requests, and bulk pricing.
Customization Available:
For custom lengths or bulk pricing, please email us:
nick.xu@lyd123.com
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